./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_6-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_a58c4bf5-3a60-42f3-8795-be7f5615830b/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_a58c4bf5-3a60-42f3-8795-be7f5615830b/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_a58c4bf5-3a60-42f3-8795-be7f5615830b/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_a58c4bf5-3a60-42f3-8795-be7f5615830b/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_6-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_a58c4bf5-3a60-42f3-8795-be7f5615830b/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_a58c4bf5-3a60-42f3-8795-be7f5615830b/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 595c6555624af5bbcf79585a20acb2500e3eeee8 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 18:37:06,782 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 18:37:06,784 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 18:37:06,791 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 18:37:06,791 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 18:37:06,792 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 18:37:06,793 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 18:37:06,794 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 18:37:06,795 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 18:37:06,796 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 18:37:06,797 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 18:37:06,797 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 18:37:06,798 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 18:37:06,798 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 18:37:06,799 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 18:37:06,800 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 18:37:06,800 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 18:37:06,801 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 18:37:06,802 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 18:37:06,804 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 18:37:06,805 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 18:37:06,806 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 18:37:06,807 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 18:37:06,807 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 18:37:06,809 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 18:37:06,809 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 18:37:06,809 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 18:37:06,810 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 18:37:06,810 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 18:37:06,811 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 18:37:06,811 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 18:37:06,811 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 18:37:06,812 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 18:37:06,812 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 18:37:06,813 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 18:37:06,813 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 18:37:06,813 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 18:37:06,813 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 18:37:06,813 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 18:37:06,814 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 18:37:06,814 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 18:37:06,815 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_a58c4bf5-3a60-42f3-8795-be7f5615830b/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-12-07 18:37:06,825 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 18:37:06,825 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 18:37:06,826 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 18:37:06,826 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 18:37:06,826 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 18:37:06,826 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 18:37:06,826 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 18:37:06,826 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 18:37:06,827 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 18:37:06,827 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 18:37:06,827 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 18:37:06,827 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 18:37:06,827 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 18:37:06,827 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 18:37:06,827 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 18:37:06,827 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 18:37:06,828 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 18:37:06,828 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 18:37:06,828 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 18:37:06,828 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 18:37:06,828 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 18:37:06,828 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 18:37:06,828 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 18:37:06,828 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 18:37:06,829 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 18:37:06,829 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-07 18:37:06,829 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 18:37:06,829 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 18:37:06,829 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 18:37:06,829 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_a58c4bf5-3a60-42f3-8795-be7f5615830b/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 595c6555624af5bbcf79585a20acb2500e3eeee8 [2019-12-07 18:37:06,928 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 18:37:06,936 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 18:37:06,938 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 18:37:06,939 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 18:37:06,939 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 18:37:06,940 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_a58c4bf5-3a60-42f3-8795-be7f5615830b/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_2calls_6-1.c [2019-12-07 18:37:06,976 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a58c4bf5-3a60-42f3-8795-be7f5615830b/bin/uautomizer/data/6ece63bd7/8745bb60ba5e463e9373400b6695979e/FLAG5026dd472 [2019-12-07 18:37:07,284 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 18:37:07,285 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_a58c4bf5-3a60-42f3-8795-be7f5615830b/sv-benchmarks/c/recursive-simple/fibo_2calls_6-1.c [2019-12-07 18:37:07,289 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a58c4bf5-3a60-42f3-8795-be7f5615830b/bin/uautomizer/data/6ece63bd7/8745bb60ba5e463e9373400b6695979e/FLAG5026dd472 [2019-12-07 18:37:07,297 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_a58c4bf5-3a60-42f3-8795-be7f5615830b/bin/uautomizer/data/6ece63bd7/8745bb60ba5e463e9373400b6695979e [2019-12-07 18:37:07,299 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 18:37:07,299 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 18:37:07,300 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 18:37:07,300 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 18:37:07,302 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 18:37:07,303 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 06:37:07" (1/1) ... [2019-12-07 18:37:07,305 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@209f21e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:37:07, skipping insertion in model container [2019-12-07 18:37:07,305 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 06:37:07" (1/1) ... [2019-12-07 18:37:07,309 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 18:37:07,319 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 18:37:07,418 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 18:37:07,420 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 18:37:07,465 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 18:37:07,474 INFO L208 MainTranslator]: Completed translation [2019-12-07 18:37:07,474 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:37:07 WrapperNode [2019-12-07 18:37:07,474 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 18:37:07,475 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 18:37:07,475 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 18:37:07,475 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 18:37:07,481 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:37:07" (1/1) ... [2019-12-07 18:37:07,484 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:37:07" (1/1) ... [2019-12-07 18:37:07,495 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 18:37:07,496 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 18:37:07,496 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 18:37:07,496 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 18:37:07,502 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:37:07" (1/1) ... [2019-12-07 18:37:07,502 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:37:07" (1/1) ... [2019-12-07 18:37:07,502 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:37:07" (1/1) ... [2019-12-07 18:37:07,502 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:37:07" (1/1) ... [2019-12-07 18:37:07,504 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:37:07" (1/1) ... [2019-12-07 18:37:07,505 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:37:07" (1/1) ... [2019-12-07 18:37:07,506 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:37:07" (1/1) ... [2019-12-07 18:37:07,507 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 18:37:07,507 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 18:37:07,507 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 18:37:07,507 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 18:37:07,508 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:37:07" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a58c4bf5-3a60-42f3-8795-be7f5615830b/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 18:37:07,555 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 18:37:07,555 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 18:37:07,555 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2019-12-07 18:37:07,555 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2019-12-07 18:37:07,555 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2019-12-07 18:37:07,556 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2019-12-07 18:37:07,669 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 18:37:07,670 INFO L287 CfgBuilder]: Removed 4 assume(true) statements. [2019-12-07 18:37:07,670 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 06:37:07 BoogieIcfgContainer [2019-12-07 18:37:07,671 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 18:37:07,672 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 18:37:07,672 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 18:37:07,674 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 18:37:07,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 06:37:07" (1/3) ... [2019-12-07 18:37:07,676 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@193c9013 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 06:37:07, skipping insertion in model container [2019-12-07 18:37:07,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:37:07" (2/3) ... [2019-12-07 18:37:07,676 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@193c9013 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 06:37:07, skipping insertion in model container [2019-12-07 18:37:07,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 06:37:07" (3/3) ... [2019-12-07 18:37:07,678 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_6-1.c [2019-12-07 18:37:07,687 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 18:37:07,693 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 18:37:07,702 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 18:37:07,718 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 18:37:07,718 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 18:37:07,718 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 18:37:07,719 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 18:37:07,719 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 18:37:07,719 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 18:37:07,719 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 18:37:07,719 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 18:37:07,732 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2019-12-07 18:37:07,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-07 18:37:07,736 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:37:07,737 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:37:07,737 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:37:07,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:37:07,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1871295635, now seen corresponding path program 1 times [2019-12-07 18:37:07,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:37:07,747 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393123508] [2019-12-07 18:37:07,748 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:37:07,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:07,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:07,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:37:07,869 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393123508] [2019-12-07 18:37:07,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 18:37:07,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-12-07 18:37:07,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965930192] [2019-12-07 18:37:07,874 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 18:37:07,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:37:07,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 18:37:07,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-07 18:37:07,884 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 5 states. [2019-12-07 18:37:07,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:37:07,941 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2019-12-07 18:37:07,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 18:37:07,942 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-07 18:37:07,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:37:07,949 INFO L225 Difference]: With dead ends: 38 [2019-12-07 18:37:07,949 INFO L226 Difference]: Without dead ends: 26 [2019-12-07 18:37:07,951 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-12-07 18:37:07,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-12-07 18:37:07,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-12-07 18:37:07,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-12-07 18:37:07,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2019-12-07 18:37:07,980 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 9 [2019-12-07 18:37:07,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:37:07,981 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2019-12-07 18:37:07,981 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 18:37:07,981 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2019-12-07 18:37:07,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-07 18:37:07,982 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:37:07,982 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:37:07,983 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:37:07,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:37:07,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1404217650, now seen corresponding path program 1 times [2019-12-07 18:37:07,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:37:07,983 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470406865] [2019-12-07 18:37:07,984 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:37:07,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:08,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:08,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:37:08,016 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470406865] [2019-12-07 18:37:08,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 18:37:08,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-12-07 18:37:08,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320392405] [2019-12-07 18:37:08,018 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 18:37:08,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:37:08,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 18:37:08,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-07 18:37:08,018 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 5 states. [2019-12-07 18:37:08,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:37:08,053 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2019-12-07 18:37:08,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 18:37:08,054 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-12-07 18:37:08,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:37:08,055 INFO L225 Difference]: With dead ends: 32 [2019-12-07 18:37:08,055 INFO L226 Difference]: Without dead ends: 28 [2019-12-07 18:37:08,056 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-12-07 18:37:08,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-12-07 18:37:08,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2019-12-07 18:37:08,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-12-07 18:37:08,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2019-12-07 18:37:08,060 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 10 [2019-12-07 18:37:08,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:37:08,061 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2019-12-07 18:37:08,061 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 18:37:08,061 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2019-12-07 18:37:08,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-12-07 18:37:08,062 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:37:08,062 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:37:08,062 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:37:08,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:37:08,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1629927371, now seen corresponding path program 1 times [2019-12-07 18:37:08,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:37:08,062 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962713831] [2019-12-07 18:37:08,062 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:37:08,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:08,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:08,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:08,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:08,141 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 18:37:08,141 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962713831] [2019-12-07 18:37:08,141 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800327155] [2019-12-07 18:37:08,141 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a58c4bf5-3a60-42f3-8795-be7f5615830b/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:37:08,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:08,165 INFO L264 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 18:37:08,169 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:37:08,208 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 18:37:08,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:37:08,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2019-12-07 18:37:08,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584762586] [2019-12-07 18:37:08,209 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-07 18:37:08,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:37:08,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-07 18:37:08,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-12-07 18:37:08,210 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 10 states. [2019-12-07 18:37:08,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:37:08,291 INFO L93 Difference]: Finished difference Result 59 states and 83 transitions. [2019-12-07 18:37:08,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-07 18:37:08,291 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2019-12-07 18:37:08,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:37:08,293 INFO L225 Difference]: With dead ends: 59 [2019-12-07 18:37:08,293 INFO L226 Difference]: Without dead ends: 35 [2019-12-07 18:37:08,294 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-12-07 18:37:08,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-12-07 18:37:08,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2019-12-07 18:37:08,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-12-07 18:37:08,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2019-12-07 18:37:08,302 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 22 [2019-12-07 18:37:08,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:37:08,302 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2019-12-07 18:37:08,302 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-07 18:37:08,302 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2019-12-07 18:37:08,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-12-07 18:37:08,304 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:37:08,304 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:37:08,505 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:37:08,505 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:37:08,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:37:08,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1285987244, now seen corresponding path program 1 times [2019-12-07 18:37:08,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:37:08,508 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171120440] [2019-12-07 18:37:08,508 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:37:08,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:08,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:08,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:08,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:08,772 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 18:37:08,773 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171120440] [2019-12-07 18:37:08,773 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176539909] [2019-12-07 18:37:08,774 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a58c4bf5-3a60-42f3-8795-be7f5615830b/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:37:08,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:08,815 INFO L264 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 18:37:08,816 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:37:08,837 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 18:37:08,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:37:08,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2019-12-07 18:37:08,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594366624] [2019-12-07 18:37:08,838 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-07 18:37:08,838 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:37:08,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-07 18:37:08,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-12-07 18:37:08,839 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand 10 states. [2019-12-07 18:37:08,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:37:08,952 INFO L93 Difference]: Finished difference Result 55 states and 78 transitions. [2019-12-07 18:37:08,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-07 18:37:08,952 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2019-12-07 18:37:08,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:37:08,954 INFO L225 Difference]: With dead ends: 55 [2019-12-07 18:37:08,955 INFO L226 Difference]: Without dead ends: 51 [2019-12-07 18:37:08,955 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-12-07 18:37:08,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-12-07 18:37:08,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2019-12-07 18:37:08,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-12-07 18:37:08,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 68 transitions. [2019-12-07 18:37:08,963 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 68 transitions. Word has length 23 [2019-12-07 18:37:08,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:37:08,963 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 68 transitions. [2019-12-07 18:37:08,963 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-07 18:37:08,963 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 68 transitions. [2019-12-07 18:37:08,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-12-07 18:37:08,965 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:37:08,965 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:37:09,166 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:37:09,166 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:37:09,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:37:09,167 INFO L82 PathProgramCache]: Analyzing trace with hash -649262923, now seen corresponding path program 1 times [2019-12-07 18:37:09,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:37:09,169 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795613753] [2019-12-07 18:37:09,169 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:37:09,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:09,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:09,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:09,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:09,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:09,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:09,330 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-07 18:37:09,330 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795613753] [2019-12-07 18:37:09,330 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742619690] [2019-12-07 18:37:09,330 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a58c4bf5-3a60-42f3-8795-be7f5615830b/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:37:09,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:09,359 INFO L264 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 18:37:09,361 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:37:09,408 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-12-07 18:37:09,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:37:09,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2019-12-07 18:37:09,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860310882] [2019-12-07 18:37:09,410 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-07 18:37:09,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:37:09,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-07 18:37:09,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2019-12-07 18:37:09,411 INFO L87 Difference]: Start difference. First operand 48 states and 68 transitions. Second operand 12 states. [2019-12-07 18:37:09,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:37:09,667 INFO L93 Difference]: Finished difference Result 114 states and 187 transitions. [2019-12-07 18:37:09,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-07 18:37:09,667 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2019-12-07 18:37:09,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:37:09,669 INFO L225 Difference]: With dead ends: 114 [2019-12-07 18:37:09,669 INFO L226 Difference]: Without dead ends: 68 [2019-12-07 18:37:09,671 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2019-12-07 18:37:09,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-12-07 18:37:09,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2019-12-07 18:37:09,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-12-07 18:37:09,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 98 transitions. [2019-12-07 18:37:09,681 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 98 transitions. Word has length 35 [2019-12-07 18:37:09,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:37:09,681 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 98 transitions. [2019-12-07 18:37:09,681 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-07 18:37:09,681 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 98 transitions. [2019-12-07 18:37:09,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-12-07 18:37:09,683 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:37:09,683 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:37:09,884 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:37:09,885 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:37:09,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:37:09,886 INFO L82 PathProgramCache]: Analyzing trace with hash 2000747716, now seen corresponding path program 1 times [2019-12-07 18:37:09,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:37:09,887 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790039537] [2019-12-07 18:37:09,887 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:37:09,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:09,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:09,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:09,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:09,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:09,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:09,976 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-07 18:37:09,977 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790039537] [2019-12-07 18:37:09,977 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020371803] [2019-12-07 18:37:09,977 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a58c4bf5-3a60-42f3-8795-be7f5615830b/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:37:09,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:09,998 INFO L264 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 18:37:10,000 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:37:10,038 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-07 18:37:10,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:37:10,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2019-12-07 18:37:10,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303180543] [2019-12-07 18:37:10,039 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-07 18:37:10,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:37:10,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-07 18:37:10,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2019-12-07 18:37:10,040 INFO L87 Difference]: Start difference. First operand 66 states and 98 transitions. Second operand 12 states. [2019-12-07 18:37:10,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:37:10,186 INFO L93 Difference]: Finished difference Result 147 states and 239 transitions. [2019-12-07 18:37:10,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-07 18:37:10,186 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2019-12-07 18:37:10,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:37:10,188 INFO L225 Difference]: With dead ends: 147 [2019-12-07 18:37:10,188 INFO L226 Difference]: Without dead ends: 83 [2019-12-07 18:37:10,190 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2019-12-07 18:37:10,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-12-07 18:37:10,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 66. [2019-12-07 18:37:10,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-12-07 18:37:10,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 96 transitions. [2019-12-07 18:37:10,202 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 96 transitions. Word has length 36 [2019-12-07 18:37:10,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:37:10,203 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 96 transitions. [2019-12-07 18:37:10,203 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-07 18:37:10,203 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 96 transitions. [2019-12-07 18:37:10,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-12-07 18:37:10,205 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:37:10,205 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:37:10,405 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:37:10,406 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:37:10,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:37:10,407 INFO L82 PathProgramCache]: Analyzing trace with hash -434541687, now seen corresponding path program 1 times [2019-12-07 18:37:10,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:37:10,408 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275755499] [2019-12-07 18:37:10,408 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:37:10,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:10,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:10,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:10,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:10,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:10,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:10,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:10,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:10,550 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-12-07 18:37:10,551 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275755499] [2019-12-07 18:37:10,551 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370752572] [2019-12-07 18:37:10,551 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a58c4bf5-3a60-42f3-8795-be7f5615830b/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:37:10,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:10,572 INFO L264 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-07 18:37:10,574 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:37:10,615 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-12-07 18:37:10,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:37:10,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2019-12-07 18:37:10,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449805396] [2019-12-07 18:37:10,616 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-07 18:37:10,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:37:10,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-07 18:37:10,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2019-12-07 18:37:10,616 INFO L87 Difference]: Start difference. First operand 66 states and 96 transitions. Second operand 16 states. [2019-12-07 18:37:10,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:37:10,892 INFO L93 Difference]: Finished difference Result 164 states and 279 transitions. [2019-12-07 18:37:10,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-07 18:37:10,892 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 50 [2019-12-07 18:37:10,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:37:10,893 INFO L225 Difference]: With dead ends: 164 [2019-12-07 18:37:10,894 INFO L226 Difference]: Without dead ends: 100 [2019-12-07 18:37:10,894 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2019-12-07 18:37:10,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-12-07 18:37:10,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 89. [2019-12-07 18:37:10,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-12-07 18:37:10,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 145 transitions. [2019-12-07 18:37:10,905 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 145 transitions. Word has length 50 [2019-12-07 18:37:10,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:37:10,906 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 145 transitions. [2019-12-07 18:37:10,906 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-07 18:37:10,906 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 145 transitions. [2019-12-07 18:37:10,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-12-07 18:37:10,909 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:37:10,909 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:37:11,109 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:37:11,109 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:37:11,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:37:11,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1917551255, now seen corresponding path program 1 times [2019-12-07 18:37:11,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:37:11,110 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496335434] [2019-12-07 18:37:11,110 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:37:11,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:11,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:11,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:11,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:11,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:11,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:11,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:11,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:11,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:11,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:11,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:11,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:11,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:11,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:11,292 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 33 proven. 58 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-12-07 18:37:11,293 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496335434] [2019-12-07 18:37:11,293 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859079130] [2019-12-07 18:37:11,293 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a58c4bf5-3a60-42f3-8795-be7f5615830b/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:37:11,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:11,326 INFO L264 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-07 18:37:11,330 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:37:11,400 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 13 proven. 90 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2019-12-07 18:37:11,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:37:11,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2019-12-07 18:37:11,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809089538] [2019-12-07 18:37:11,401 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-07 18:37:11,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:37:11,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-07 18:37:11,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2019-12-07 18:37:11,401 INFO L87 Difference]: Start difference. First operand 89 states and 145 transitions. Second operand 18 states. [2019-12-07 18:37:11,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:37:11,719 INFO L93 Difference]: Finished difference Result 207 states and 388 transitions. [2019-12-07 18:37:11,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-07 18:37:11,719 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 91 [2019-12-07 18:37:11,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:37:11,720 INFO L225 Difference]: With dead ends: 207 [2019-12-07 18:37:11,720 INFO L226 Difference]: Without dead ends: 114 [2019-12-07 18:37:11,722 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2019-12-07 18:37:11,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-12-07 18:37:11,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 88. [2019-12-07 18:37:11,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-12-07 18:37:11,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 135 transitions. [2019-12-07 18:37:11,731 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 135 transitions. Word has length 91 [2019-12-07 18:37:11,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:37:11,732 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 135 transitions. [2019-12-07 18:37:11,732 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-07 18:37:11,732 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 135 transitions. [2019-12-07 18:37:11,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-12-07 18:37:11,733 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:37:11,733 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2019-12-07 18:37:11,934 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:37:11,935 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:37:11,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:37:11,936 INFO L82 PathProgramCache]: Analyzing trace with hash -463941571, now seen corresponding path program 1 times [2019-12-07 18:37:11,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:37:11,937 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806788522] [2019-12-07 18:37:11,937 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:37:11,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:12,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:12,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:12,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:12,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:12,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:12,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:12,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:12,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:12,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:12,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:12,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:12,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:12,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:12,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:12,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:12,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:12,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:12,247 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 53 proven. 117 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2019-12-07 18:37:12,247 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806788522] [2019-12-07 18:37:12,248 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638933325] [2019-12-07 18:37:12,248 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a58c4bf5-3a60-42f3-8795-be7f5615830b/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:37:12,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:12,284 INFO L264 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-07 18:37:12,289 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:37:12,337 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 48 proven. 89 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2019-12-07 18:37:12,337 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:37:12,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 18 [2019-12-07 18:37:12,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967763355] [2019-12-07 18:37:12,339 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-07 18:37:12,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:37:12,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-07 18:37:12,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2019-12-07 18:37:12,339 INFO L87 Difference]: Start difference. First operand 88 states and 135 transitions. Second operand 18 states. [2019-12-07 18:37:12,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:37:12,610 INFO L93 Difference]: Finished difference Result 209 states and 348 transitions. [2019-12-07 18:37:12,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-07 18:37:12,610 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 119 [2019-12-07 18:37:12,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:37:12,612 INFO L225 Difference]: With dead ends: 209 [2019-12-07 18:37:12,612 INFO L226 Difference]: Without dead ends: 121 [2019-12-07 18:37:12,613 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2019-12-07 18:37:12,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-12-07 18:37:12,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 111. [2019-12-07 18:37:12,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-12-07 18:37:12,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 175 transitions. [2019-12-07 18:37:12,623 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 175 transitions. Word has length 119 [2019-12-07 18:37:12,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:37:12,624 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 175 transitions. [2019-12-07 18:37:12,624 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-07 18:37:12,624 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 175 transitions. [2019-12-07 18:37:12,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2019-12-07 18:37:12,627 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:37:12,627 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 18, 18, 17, 14, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 8, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2019-12-07 18:37:12,828 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:37:12,829 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:37:12,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:37:12,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1957575691, now seen corresponding path program 2 times [2019-12-07 18:37:12,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:37:12,831 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709142329] [2019-12-07 18:37:12,831 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:37:12,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:12,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:12,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:13,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:13,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:13,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:13,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:13,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:13,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:13,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:13,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:13,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:13,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:13,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:13,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:13,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:13,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:13,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:13,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:13,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:13,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:13,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:13,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:13,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:13,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:13,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:13,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:13,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:13,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:13,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:13,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:13,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:13,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:13,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:13,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:13,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:13,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:13,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:13,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:13,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:13,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2003 backedges. 467 proven. 589 refuted. 0 times theorem prover too weak. 947 trivial. 0 not checked. [2019-12-07 18:37:13,450 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709142329] [2019-12-07 18:37:13,450 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190020455] [2019-12-07 18:37:13,450 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a58c4bf5-3a60-42f3-8795-be7f5615830b/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:37:13,511 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 18:37:13,511 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:37:13,512 INFO L264 TraceCheckSpWp]: Trace formula consists of 597 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-07 18:37:13,518 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:37:13,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2003 backedges. 174 proven. 310 refuted. 0 times theorem prover too weak. 1519 trivial. 0 not checked. [2019-12-07 18:37:13,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:37:13,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 11] total 28 [2019-12-07 18:37:13,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125532411] [2019-12-07 18:37:13,626 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-12-07 18:37:13,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:37:13,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-12-07 18:37:13,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2019-12-07 18:37:13,627 INFO L87 Difference]: Start difference. First operand 111 states and 175 transitions. Second operand 28 states. [2019-12-07 18:37:14,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:37:14,199 INFO L93 Difference]: Finished difference Result 310 states and 603 transitions. [2019-12-07 18:37:14,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-12-07 18:37:14,199 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 268 [2019-12-07 18:37:14,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:37:14,201 INFO L225 Difference]: With dead ends: 310 [2019-12-07 18:37:14,202 INFO L226 Difference]: Without dead ends: 165 [2019-12-07 18:37:14,203 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 354 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=1329, Unknown=0, NotChecked=0, Total=1560 [2019-12-07 18:37:14,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2019-12-07 18:37:14,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 112. [2019-12-07 18:37:14,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-12-07 18:37:14,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 167 transitions. [2019-12-07 18:37:14,214 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 167 transitions. Word has length 268 [2019-12-07 18:37:14,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:37:14,215 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 167 transitions. [2019-12-07 18:37:14,215 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-12-07 18:37:14,215 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 167 transitions. [2019-12-07 18:37:14,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2019-12-07 18:37:14,217 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:37:14,217 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 14, 14, 13, 12, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 4, 4, 2, 1, 1, 1, 1, 1, 1] [2019-12-07 18:37:14,418 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:37:14,418 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:37:14,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:37:14,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1502984625, now seen corresponding path program 3 times [2019-12-07 18:37:14,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:37:14,419 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138018488] [2019-12-07 18:37:14,419 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:37:14,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:14,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:14,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:14,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:14,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:14,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:14,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:14,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:14,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:14,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:14,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:14,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:14,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:14,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:14,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:14,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:14,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:14,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:14,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:14,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:14,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:14,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:14,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:14,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:14,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:14,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:14,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:14,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:14,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:14,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:14,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:14,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:14,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1248 backedges. 289 proven. 362 refuted. 0 times theorem prover too weak. 597 trivial. 0 not checked. [2019-12-07 18:37:14,857 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138018488] [2019-12-07 18:37:14,857 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019364652] [2019-12-07 18:37:14,857 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a58c4bf5-3a60-42f3-8795-be7f5615830b/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:37:14,896 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-12-07 18:37:14,896 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:37:14,897 INFO L264 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-07 18:37:14,901 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:37:15,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1248 backedges. 661 proven. 42 refuted. 0 times theorem prover too weak. 545 trivial. 0 not checked. [2019-12-07 18:37:15,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:37:15,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 13] total 34 [2019-12-07 18:37:15,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736913191] [2019-12-07 18:37:15,042 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-12-07 18:37:15,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:37:15,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-12-07 18:37:15,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=980, Unknown=0, NotChecked=0, Total=1122 [2019-12-07 18:37:15,043 INFO L87 Difference]: Start difference. First operand 112 states and 167 transitions. Second operand 34 states. [2019-12-07 18:37:15,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:37:15,524 INFO L93 Difference]: Finished difference Result 240 states and 403 transitions. [2019-12-07 18:37:15,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-12-07 18:37:15,524 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 214 [2019-12-07 18:37:15,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:37:15,526 INFO L225 Difference]: With dead ends: 240 [2019-12-07 18:37:15,526 INFO L226 Difference]: Without dead ends: 131 [2019-12-07 18:37:15,527 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 269 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=268, Invalid=1712, Unknown=0, NotChecked=0, Total=1980 [2019-12-07 18:37:15,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2019-12-07 18:37:15,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 126. [2019-12-07 18:37:15,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-12-07 18:37:15,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 166 transitions. [2019-12-07 18:37:15,537 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 166 transitions. Word has length 214 [2019-12-07 18:37:15,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:37:15,537 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 166 transitions. [2019-12-07 18:37:15,537 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-12-07 18:37:15,537 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 166 transitions. [2019-12-07 18:37:15,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2019-12-07 18:37:15,539 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:37:15,539 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 10, 9, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2019-12-07 18:37:15,739 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:37:15,740 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:37:15,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:37:15,741 INFO L82 PathProgramCache]: Analyzing trace with hash 634625338, now seen corresponding path program 4 times [2019-12-07 18:37:15,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:37:15,742 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053733829] [2019-12-07 18:37:15,742 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:37:15,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:15,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:15,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:15,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:15,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:15,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:15,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:15,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:15,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:15,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:15,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:15,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:15,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:15,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:15,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:15,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:15,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:15,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:15,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:15,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:15,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:15,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:15,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:15,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:15,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:15,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:15,897 INFO L134 CoverageAnalysis]: Checked inductivity of 777 backedges. 131 proven. 3 refuted. 0 times theorem prover too weak. 643 trivial. 0 not checked. [2019-12-07 18:37:15,898 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053733829] [2019-12-07 18:37:15,898 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426008162] [2019-12-07 18:37:15,898 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a58c4bf5-3a60-42f3-8795-be7f5615830b/bin/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:37:15,939 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 18:37:15,939 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:37:15,940 INFO L264 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-07 18:37:15,942 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:37:15,966 INFO L134 CoverageAnalysis]: Checked inductivity of 777 backedges. 171 proven. 0 refuted. 0 times theorem prover too weak. 606 trivial. 0 not checked. [2019-12-07 18:37:15,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-07 18:37:15,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2019-12-07 18:37:15,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870580743] [2019-12-07 18:37:15,967 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 18:37:15,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:37:15,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 18:37:15,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-12-07 18:37:15,967 INFO L87 Difference]: Start difference. First operand 126 states and 166 transitions. Second operand 6 states. [2019-12-07 18:37:15,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:37:15,996 INFO L93 Difference]: Finished difference Result 240 states and 329 transitions. [2019-12-07 18:37:15,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 18:37:15,997 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 172 [2019-12-07 18:37:15,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:37:15,998 INFO L225 Difference]: With dead ends: 240 [2019-12-07 18:37:15,998 INFO L226 Difference]: Without dead ends: 116 [2019-12-07 18:37:15,999 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 223 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-12-07 18:37:15,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2019-12-07 18:37:16,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2019-12-07 18:37:16,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-12-07 18:37:16,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 148 transitions. [2019-12-07 18:37:16,005 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 148 transitions. Word has length 172 [2019-12-07 18:37:16,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:37:16,006 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 148 transitions. [2019-12-07 18:37:16,006 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 18:37:16,006 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 148 transitions. [2019-12-07 18:37:16,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-12-07 18:37:16,007 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:37:16,007 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 9, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2019-12-07 18:37:16,208 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:37:16,208 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:37:16,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:37:16,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1745059098, now seen corresponding path program 5 times [2019-12-07 18:37:16,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:37:16,209 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934778516] [2019-12-07 18:37:16,209 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:37:16,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:16,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:16,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:16,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:16,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:16,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:16,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:16,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:16,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:16,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:16,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:16,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:16,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:16,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:16,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:16,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:16,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:16,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:16,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:16,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:16,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:16,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:16,484 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 145 proven. 138 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2019-12-07 18:37:16,485 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934778516] [2019-12-07 18:37:16,485 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438707286] [2019-12-07 18:37:16,485 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a58c4bf5-3a60-42f3-8795-be7f5615830b/bin/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:37:16,522 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2019-12-07 18:37:16,523 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:37:16,523 INFO L264 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 16 conjunts are in the unsatisfiable core [2019-12-07 18:37:16,525 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:37:16,590 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 150 proven. 142 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2019-12-07 18:37:16,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:37:16,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14] total 25 [2019-12-07 18:37:16,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114492245] [2019-12-07 18:37:16,591 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-12-07 18:37:16,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:37:16,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-12-07 18:37:16,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2019-12-07 18:37:16,591 INFO L87 Difference]: Start difference. First operand 116 states and 148 transitions. Second operand 25 states. [2019-12-07 18:37:16,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:37:16,855 INFO L93 Difference]: Finished difference Result 244 states and 330 transitions. [2019-12-07 18:37:16,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-07 18:37:16,855 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 146 [2019-12-07 18:37:16,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:37:16,856 INFO L225 Difference]: With dead ends: 244 [2019-12-07 18:37:16,856 INFO L226 Difference]: Without dead ends: 130 [2019-12-07 18:37:16,857 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=148, Invalid=782, Unknown=0, NotChecked=0, Total=930 [2019-12-07 18:37:16,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2019-12-07 18:37:16,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 126. [2019-12-07 18:37:16,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-12-07 18:37:16,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 160 transitions. [2019-12-07 18:37:16,862 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 160 transitions. Word has length 146 [2019-12-07 18:37:16,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:37:16,863 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 160 transitions. [2019-12-07 18:37:16,863 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-12-07 18:37:16,863 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 160 transitions. [2019-12-07 18:37:16,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2019-12-07 18:37:16,864 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:37:16,864 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 14, 14, 13, 12, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 4, 4, 2, 1, 1, 1, 1, 1, 1] [2019-12-07 18:37:17,064 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:37:17,066 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:37:17,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:37:17,067 INFO L82 PathProgramCache]: Analyzing trace with hash 245292255, now seen corresponding path program 6 times [2019-12-07 18:37:17,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:37:17,067 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478965408] [2019-12-07 18:37:17,068 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:37:17,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:17,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:17,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:17,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:17,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:17,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:17,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:17,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:17,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:17,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:17,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:17,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:17,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:17,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:17,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:17,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:17,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:17,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:17,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:17,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:17,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:17,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:17,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:17,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:17,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:17,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:17,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:17,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:17,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:17,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:17,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:17,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:17,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1248 backedges. 210 proven. 368 refuted. 0 times theorem prover too weak. 670 trivial. 0 not checked. [2019-12-07 18:37:17,444 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478965408] [2019-12-07 18:37:17,444 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830098206] [2019-12-07 18:37:17,444 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a58c4bf5-3a60-42f3-8795-be7f5615830b/bin/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:37:17,490 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-12-07 18:37:17,490 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:37:17,491 INFO L264 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-07 18:37:17,493 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:37:17,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1248 backedges. 294 proven. 58 refuted. 0 times theorem prover too weak. 896 trivial. 0 not checked. [2019-12-07 18:37:17,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:37:17,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 10] total 30 [2019-12-07 18:37:17,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832046175] [2019-12-07 18:37:17,581 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-12-07 18:37:17,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:37:17,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-12-07 18:37:17,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2019-12-07 18:37:17,581 INFO L87 Difference]: Start difference. First operand 126 states and 160 transitions. Second operand 30 states. [2019-12-07 18:37:18,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:37:18,179 INFO L93 Difference]: Finished difference Result 281 states and 406 transitions. [2019-12-07 18:37:18,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-12-07 18:37:18,180 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 214 [2019-12-07 18:37:18,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:37:18,181 INFO L225 Difference]: With dead ends: 281 [2019-12-07 18:37:18,181 INFO L226 Difference]: Without dead ends: 160 [2019-12-07 18:37:18,183 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 726 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=358, Invalid=2192, Unknown=0, NotChecked=0, Total=2550 [2019-12-07 18:37:18,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2019-12-07 18:37:18,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 143. [2019-12-07 18:37:18,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-12-07 18:37:18,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 184 transitions. [2019-12-07 18:37:18,189 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 184 transitions. Word has length 214 [2019-12-07 18:37:18,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:37:18,189 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 184 transitions. [2019-12-07 18:37:18,189 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-12-07 18:37:18,189 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 184 transitions. [2019-12-07 18:37:18,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-12-07 18:37:18,190 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:37:18,190 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 10, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1] [2019-12-07 18:37:18,391 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:37:18,391 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:37:18,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:37:18,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1112792143, now seen corresponding path program 7 times [2019-12-07 18:37:18,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:37:18,391 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361865072] [2019-12-07 18:37:18,391 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:37:18,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:18,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:18,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:18,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:18,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:18,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:18,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:18,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:18,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:18,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:18,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:18,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:18,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:18,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:18,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:18,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:18,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:18,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:18,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:18,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:18,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:18,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:18,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:18,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:18,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:18,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:18,986 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2019-12-07 18:37:18,987 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361865072] [2019-12-07 18:37:18,987 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252970636] [2019-12-07 18:37:18,987 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a58c4bf5-3a60-42f3-8795-be7f5615830b/bin/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:37:19,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:19,036 INFO L264 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 103 conjunts are in the unsatisfiable core [2019-12-07 18:37:19,039 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:37:19,464 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2019-12-07 18:37:19,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:37:19,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 36 [2019-12-07 18:37:19,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375242724] [2019-12-07 18:37:19,465 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-12-07 18:37:19,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:37:19,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-12-07 18:37:19,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1175, Unknown=0, NotChecked=0, Total=1260 [2019-12-07 18:37:19,465 INFO L87 Difference]: Start difference. First operand 143 states and 184 transitions. Second operand 36 states. [2019-12-07 18:37:19,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:37:19,713 INFO L93 Difference]: Finished difference Result 150 states and 193 transitions. [2019-12-07 18:37:19,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-07 18:37:19,713 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 173 [2019-12-07 18:37:19,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:37:19,714 INFO L225 Difference]: With dead ends: 150 [2019-12-07 18:37:19,714 INFO L226 Difference]: Without dead ends: 146 [2019-12-07 18:37:19,715 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 227 SyntacticMatches, 14 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=85, Invalid=1175, Unknown=0, NotChecked=0, Total=1260 [2019-12-07 18:37:19,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-12-07 18:37:19,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 143. [2019-12-07 18:37:19,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-12-07 18:37:19,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 182 transitions. [2019-12-07 18:37:19,720 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 182 transitions. Word has length 173 [2019-12-07 18:37:19,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:37:19,721 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 182 transitions. [2019-12-07 18:37:19,721 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-12-07 18:37:19,721 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 182 transitions. [2019-12-07 18:37:19,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2019-12-07 18:37:19,722 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:37:19,722 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 13, 12, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2019-12-07 18:37:19,922 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:37:19,923 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:37:19,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:37:19,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1640173863, now seen corresponding path program 8 times [2019-12-07 18:37:19,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:37:19,923 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001228479] [2019-12-07 18:37:19,923 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:37:19,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:19,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:19,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:19,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:20,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:20,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:20,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:20,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:20,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:20,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:20,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:20,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:20,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:20,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:20,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:20,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:20,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:20,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:20,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:20,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:20,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:20,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:20,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:20,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:20,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:20,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:20,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:20,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:20,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:20,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:20,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:20,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:37:20,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 201 proven. 323 refuted. 0 times theorem prover too weak. 716 trivial. 0 not checked. [2019-12-07 18:37:20,230 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001228479] [2019-12-07 18:37:20,230 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717948249] [2019-12-07 18:37:20,230 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a58c4bf5-3a60-42f3-8795-be7f5615830b/bin/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:37:20,283 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 18:37:20,283 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:37:20,284 INFO L264 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-07 18:37:20,287 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:37:20,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 111 proven. 313 refuted. 0 times theorem prover too weak. 816 trivial. 0 not checked. [2019-12-07 18:37:20,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:37:20,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 12] total 25 [2019-12-07 18:37:20,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910882860] [2019-12-07 18:37:20,367 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-12-07 18:37:20,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:37:20,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-12-07 18:37:20,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2019-12-07 18:37:20,367 INFO L87 Difference]: Start difference. First operand 143 states and 182 transitions. Second operand 25 states. [2019-12-07 18:37:20,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:37:20,580 INFO L93 Difference]: Finished difference Result 263 states and 336 transitions. [2019-12-07 18:37:20,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-07 18:37:20,581 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 214 [2019-12-07 18:37:20,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:37:20,581 INFO L225 Difference]: With dead ends: 263 [2019-12-07 18:37:20,581 INFO L226 Difference]: Without dead ends: 0 [2019-12-07 18:37:20,583 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 270 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2019-12-07 18:37:20,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-12-07 18:37:20,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-12-07 18:37:20,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-12-07 18:37:20,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-12-07 18:37:20,583 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 214 [2019-12-07 18:37:20,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:37:20,583 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 18:37:20,584 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-12-07 18:37:20,584 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-12-07 18:37:20,584 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-12-07 18:37:20,784 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:37:20,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-12-07 18:37:21,528 WARN L192 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 30 [2019-12-07 18:37:21,863 WARN L192 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 25 [2019-12-07 18:37:21,865 INFO L246 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-12-07 18:37:21,865 INFO L246 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-12-07 18:37:21,865 INFO L246 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-12-07 18:37:21,865 INFO L246 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2019-12-07 18:37:21,865 INFO L242 CegarLoopResult]: At program point L41(lines 35 42) the Hoare annotation is: (<= 6 ULTIMATE.start_main_~x~0) [2019-12-07 18:37:21,866 INFO L246 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2019-12-07 18:37:21,866 INFO L246 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2019-12-07 18:37:21,866 INFO L242 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (and (<= 6 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 6)) [2019-12-07 18:37:21,866 INFO L246 CegarLoopResult]: For program point L37-1(line 37) no Hoare annotation was computed. [2019-12-07 18:37:21,866 INFO L246 CegarLoopResult]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2019-12-07 18:37:21,866 INFO L249 CegarLoopResult]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2019-12-07 18:37:21,866 INFO L242 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (and (not (<= |fibo2_#in~n| 1)) (= fibo2_~n |fibo2_#in~n|)) [2019-12-07 18:37:21,866 INFO L246 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2019-12-07 18:37:21,866 INFO L242 CegarLoopResult]: At program point L23-2(line 23) the Hoare annotation is: (let ((.cse0 (and (<= fibo2_~n 2) (<= 1 |fibo2_#t~ret2|) (<= |fibo2_#t~ret2| 1) (<= 2 |fibo2_#in~n|)))) (and (or .cse0 (not (<= |fibo2_#in~n| 3))) (or (<= |fibo2_#in~n| 4) (<= 6 |fibo2_#in~n|) (and (<= 3 |fibo2_#t~ret2|) (<= |fibo2_#t~ret2| 3))) (= fibo2_~n |fibo2_#in~n|) (or .cse0 (<= 5 fibo2_~n) (and (<= |fibo2_#t~ret2| 2) (<= 2 |fibo2_#t~ret2|))))) [2019-12-07 18:37:21,866 INFO L246 CegarLoopResult]: For program point L20(lines 20 24) no Hoare annotation was computed. [2019-12-07 18:37:21,866 INFO L246 CegarLoopResult]: For program point L23-3(line 23) no Hoare annotation was computed. [2019-12-07 18:37:21,866 INFO L246 CegarLoopResult]: For program point L18(lines 18 24) no Hoare annotation was computed. [2019-12-07 18:37:21,866 INFO L246 CegarLoopResult]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2019-12-07 18:37:21,866 INFO L246 CegarLoopResult]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2019-12-07 18:37:21,866 INFO L249 CegarLoopResult]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2019-12-07 18:37:21,867 INFO L242 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: (and (< 1 fibo1_~n) (= fibo1_~n |fibo1_#in~n|)) [2019-12-07 18:37:21,867 INFO L246 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2019-12-07 18:37:21,867 INFO L242 CegarLoopResult]: At program point L13-2(line 13) the Hoare annotation is: (and (not (<= |fibo1_#in~n| 1)) (or (and (<= 1 |fibo1_#t~ret0|) (<= |fibo1_#in~n| 3) (<= |fibo1_#t~ret0| 1)) (not (<= |fibo1_#in~n| 4))) (or (<= |fibo1_#in~n| 5) (<= 7 |fibo1_#in~n|) (and (<= |fibo1_#t~ret0| 5) (<= 5 |fibo1_#t~ret0|))) (= fibo1_~n |fibo1_#in~n|)) [2019-12-07 18:37:21,867 INFO L246 CegarLoopResult]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2019-12-07 18:37:21,867 INFO L246 CegarLoopResult]: For program point L10(lines 10 14) no Hoare annotation was computed. [2019-12-07 18:37:21,867 INFO L246 CegarLoopResult]: For program point L13-3(line 13) no Hoare annotation was computed. [2019-12-07 18:37:21,867 INFO L246 CegarLoopResult]: For program point L8(lines 8 14) no Hoare annotation was computed. [2019-12-07 18:37:21,867 INFO L246 CegarLoopResult]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2019-12-07 18:37:21,877 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 06:37:21 BoogieIcfgContainer [2019-12-07 18:37:21,877 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 18:37:21,877 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 18:37:21,877 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 18:37:21,877 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 18:37:21,878 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 06:37:07" (3/4) ... [2019-12-07 18:37:21,880 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-12-07 18:37:21,884 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo2 [2019-12-07 18:37:21,884 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo1 [2019-12-07 18:37:21,886 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-12-07 18:37:21,887 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-12-07 18:37:21,914 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_a58c4bf5-3a60-42f3-8795-be7f5615830b/bin/uautomizer/witness.graphml [2019-12-07 18:37:21,914 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 18:37:21,915 INFO L168 Benchmark]: Toolchain (without parser) took 14615.47 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 371.2 MB). Free memory was 936.7 MB in the beginning and 1.4 GB in the end (delta: -422.2 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 18:37:21,915 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 954.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 18:37:21,915 INFO L168 Benchmark]: CACSL2BoogieTranslator took 174.49 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 100.7 MB). Free memory was 935.3 MB in the beginning and 1.1 GB in the end (delta: -161.4 MB). Peak memory consumption was 20.8 MB. Max. memory is 11.5 GB. [2019-12-07 18:37:21,916 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.71 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2019-12-07 18:37:21,916 INFO L168 Benchmark]: Boogie Preprocessor took 11.27 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2019-12-07 18:37:21,916 INFO L168 Benchmark]: RCFGBuilder took 163.56 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 11.5 GB. [2019-12-07 18:37:21,916 INFO L168 Benchmark]: TraceAbstraction took 14205.40 ms. Allocated memory was 1.1 GB in the beginning and 1.4 GB in the end (delta: 270.5 MB). Free memory was 1.1 GB in the beginning and 1.4 GB in the end (delta: -289.1 MB). Peak memory consumption was 537.0 MB. Max. memory is 11.5 GB. [2019-12-07 18:37:21,917 INFO L168 Benchmark]: Witness Printer took 36.86 ms. Allocated memory is still 1.4 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 3.7 MB). Peak memory consumption was 3.7 MB. Max. memory is 11.5 GB. [2019-12-07 18:37:21,918 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 954.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 174.49 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 100.7 MB). Free memory was 935.3 MB in the beginning and 1.1 GB in the end (delta: -161.4 MB). Peak memory consumption was 20.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 20.71 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 11.27 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 163.56 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 14205.40 ms. Allocated memory was 1.1 GB in the beginning and 1.4 GB in the end (delta: 270.5 MB). Free memory was 1.1 GB in the beginning and 1.4 GB in the end (delta: -289.1 MB). Peak memory consumption was 537.0 MB. Max. memory is 11.5 GB. * Witness Printer took 36.86 ms. Allocated memory is still 1.4 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 3.7 MB). Peak memory consumption was 3.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: 6 <= x - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 28 locations, 1 error locations. Result: SAFE, OverallTime: 13.0s, OverallIterations: 16, TraceHistogramMax: 21, AutomataDifference: 4.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.0s, HoareTripleCheckerStatistics: 485 SDtfs, 848 SDslu, 4710 SDs, 0 SdLazy, 6620 SolverSat, 869 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2648 GetRequests, 2269 SyntacticMatches, 19 SemanticMatches, 360 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2714 ImplicationChecksByTransitivity, 3.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=143occurred in iteration=14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 16 MinimizatonAttempts, 155 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 701 PreInvPairs, 1173 NumberOfFragments, 124 HoareAnnotationTreeSize, 701 FomulaSimplifications, 9137 FormulaSimplificationTreeSizeReduction, 0.3s HoareSimplificationTime, 8 FomulaSimplificationsInter, 7447 FormulaSimplificationTreeSizeReductionInter, 0.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 4.8s InterpolantComputationTime, 3573 NumberOfCodeBlocks, 3402 NumberOfCodeBlocksAsserted, 56 NumberOfCheckSat, 3543 ConstructedInterpolants, 0 QuantifiedInterpolants, 1219797 SizeOfPredicates, 66 NumberOfNonLiveVariables, 3572 ConjunctsInSsa, 237 ConjunctsInUnsatCore, 30 InterpolantComputations, 3 PerfectInterpolantSequences, 13345/16956 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...